yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Setting up 2 step expressions


2m read
·Nov 10, 2024

My book is 58 pages. I have already read 13 pages. I plan to read five pages each day until I finish the book. Which equation could I use to find out how many days, d, it will take to finish reading the book?

So pause this video and see if you can figure that out.

Okay, so let's first think about the important information they're giving us. They're giving us the number of pages that are in the book. They're giving us how much we've already read. We've already read 13 pages, and they also tell us how much we plan to read. I plan to read five pages each day until the book is finished.

And then we want an equation that we could use to find how many days, and d is how we're going to represent the number of days. Let me do that in the same color. It'll take to finish reading the book.

All right, so if we knew how many pages we have to read and we were divided by the fact that we're reading five pages per day, well then that would give us the number of days. So how many pages do we have left to read in the book? Well, the book is 58 pages. We've already read 13, so we could subtract out 13 of those.

So this expression right over here, this is how many pages we have left in the book. Let me write that down. How many pages left? And if we want to figure out how many days it's going to take to read these, we would divide this by how many pages we read each day.

And we see that we read 5 pages each day. So if we divide this by 5, then this whole expression—let me do it in this color—this whole expression is going to tell us how many days left. How many days left? And so this is going to be equal to d because d is the number of days left to finish reading the book.

Now if we look at these choices, that's exactly what we have right over here in choice c. We can make sure that these others don't make sense.

58 plus 13? No, that would be a situation where we're reading 13 pages more than the number of pages that are in the book. That doesn't make sense, and that's happening for both choice a and choice b. It would also not make sense to multiply by five because it's not going to take you five times more than the number of pages to read the book. You're going to divide by five. You're reading five pages every day.

And we are done.

More Articles

View All
The Housing Market Just Went ABSURD
What’s up, guys? It’s Graham here! So, as I’m sure you’re all aware, the housing market is absolutely bonkers. It was just revealed that housing prices have hit yet another record all-time high, rising 17% year-over-year. Buyers are paying a million doll…
Molecules Bumping Into One Another | Genius
Should I brew more? Still warm, and it’s been awhile. But the Law of Cooling is a decaying exponential. But you need a measurement on the liquid to get the heat transfer coefficient. Don’t worry about the measurement for now. We’ll find a new way to thin…
Sensory processing and the brain | Cells and organisms | Middle school biology | Khan Academy
As humans, we have a lot of senses that we put to use on a regular basis. They include sight, smell, taste, touch, and hearing. But have you ever wondered how it all works? How do you look at a beautiful painting in an art museum, or smell the rain outsid…
Sending Humans to Mars: How Will We Do it? | Nat Geo Live
Why are we so fascinated with Mars? There’s this visceral connection that we have. It’s been a constant steady light in the night sky for us. You and I can go outside tonight on a clear night, look towards the southwestern sky, and see a bright orange sta…
Stupid Simple Money Rules
Here’s a fact you might not be aware of: the moment you walk out of the door of your apartment, everybody is looking for one thing: to sell you something and take away your money. And make no mistake, if you don’t take great care of your money and make an…
250,000 DOMINOES! - The American Domino Record - Smarter Every Day 178
DESTIN>> That’s right! You stand on the right. Hey, it’s me, Destin. Welcome back to Smarter Every Day. I’m teaching my kids that you’re supposed to stand on the right. Stand on the right. He’s standing… she’s there… you go. All right, we’re in Detr…